ICP DAS USA PCI-1202L User Manual page 104

PCI-1202/1602/180x Series Card
Multi-Function Boards
 Limitation
The system will interrupt the driver software under multi-task OS, like Windows. The partial
function of D/A arbitrary waveform generation is implemented by software. Therefore the D/A
output waveform will be distorted sometimes. Refer to Figure 8-5 for details.
If the user has to generate the periodic wave form such as sine, cosine ..., and the analysis is similar
to spectrum analysis, this type of output distortion will cause little trouble. The D/A output maybe
distorted but spectrum response is still stable.
If the user uses DOS, the D/A output waveform will not be distorted in any time.
Figure 8-5: The D/A waveform is distorted but the spectrum response is nearly the same.
User Manual/ Ver. 4.8/ Mar. 2015/ PMH-0014-48/ Page: 104